Condition NISSAN TERRANO 2002 Service Repair Manual

Main 12 Causes of Overheating
Engine Step Inspection item Equipment Condition Reference page
OFF1IBlocked radiator
IBlocked radiator grille
IBlocked bumperIVisual No blocking Ð
2ICoolant mixtureICoolant tester 50 - 50% coolant mixtureSee MA section, ªRECOM-
MENDED FLUIDS AND
LUBRICANTSº.
3ICoolant levelIVisualCoolant up to MAX level in
reservoir tank and radiator
filler neckSee LC section, ªChanging
Engine Coolantº.
4IRadiator capIPressure tester78 - 98 kPa (0.78 - 0.98
bar, 0.8 - 1.0 kg/cm
2,11-14
psi)See LC section, ªSystem
Checkº.
ON*
25ICoolant leaksIVisual No leaksSee LC section, ªSystem
Checkº.
ON*
26IThermostatITouch the upper and
lower radiator hosesBoth hoses should be hotSee LC section, ªThermo-
statº and ªRadiatorº.
ON*
17ICooling fanICONSULT-II OperatingSee Trouble Diagnosis for
DTC P1217, EC-418.
OFF 8ICombustion gas leakIColor checker chemical
tester 4 Gas analyzerNegative Ð
ON*
39ICoolant temperature
gaugeIVisualGauge less than 3/4 when
drivingÐ
ICoolant overflow to res-
ervoir tankIVisualNo overflow during driving
and idlingSee LC section, ªChanging
Engine Coolantº.
OFF*
410ICoolant return from res-
ervoir tank to radiatorIVisualShould be initial level in
reservoir tankSee LC section, ªREFILL-
ING ENGINE COOLANTº.
OFF11ICylinder headIStraight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)See EM section, ªInspec-
tionº.
12ICylinder block and pis-
tonsIVisualNo scuffing on cylinder
walls or pistonSee EM section, ªInspec-
tionº.
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to LC section, ªOVERHEATING CAUSE ANALYSISº.
DTC P1217 OVER HEATTD27Ti
EC-425

Component Inspection
COOLING FAN RELAY AND A/C RELAY
1. Turn ignition switch OFF.
2. Disconnect cooling fan relay and A/C relay.
3. Check continuity between each relay terminalq
3andq5under
the following conditions.
Apply 12V direct current between
relay terminalsq
1andq2.Continuity should exist.
No voltage applied. Continuity should not exist.
4. If NG, replace cooling fan relay or/and A/C relay(s).
MEC942D
DTC P1217 OVER HEATTD27Ti
EC-426

System Description
EGR CONTROL
Camshaft position sensor (TDC)EEngine speed
ECMEEGRC-solenoid valve A
Mass air flow sensorEMass air flowEEGRC-solenoid valve B
Engine coolant temperature sensorEEngine coolant temperatureEThrottle control solenoid valve
Ignition switchEStart signal
Atmospheric pressure sensor
EAtmospheric pressure
Air conditioner switch
EAir conditioner ªONº signal
The ECM receives signals sent from the engine coolant tempera-
ture sensor, crankshaft position sensor (TDC), ignition switch etc.
to determine engine speed and operating conditions. Based on
these signals, the ECM controls EGRC-solenoid valve (A and B)
operation and throttle solenoid valve operation.
The EGR control stops when engine coolant temperature is below
45ÉC (113ÉF), at idling, at starting and when the system compo-
nents and engine speed signals are disordered.
Engine coolant
temperature
ÉC (ÉF)LoadEGRC-solenoid valve
Throttle control
solenoid valveEGR valveThrottle control
valveAmount of EGR
gas
AB
Below 45 (113) AnyOFF
(Closed)OFF
(Closed)OFF
(Closed)Fully closed Fully open Ð
Above 45 (113)Low loadON
(Open)ON
(Open)ON
(Open)Fully open Closed Large
Medium load-1ON
(Open)ON
(Open)OFF
(Closed)Fully open Fully open Medium
Medium load-2ON
(Open)OFF
(Closed)OFF
(Closed)Half open Fully open Small
High loadOFF
(Closed)OFF
(Closed)OFF
(Closed)Fully closed Fully open Ð
Component Description
The EGRC-solenoid valves A and B, control vacuum pressure act-
ing on the EGR valve. The EGR control valve will be fully opened,
half-opened or fully closed, as required.
The throttle control solenoid valve controls vacuum pressure acting
on the throttle control valve. Thus, intake air passages are opened
or closed in relation to exhaust gas and intake air. Utilizing the
relationship between exhaust gas pressure and intake air pressure
control, the amount of EGR (exhaust gas recirculated) is regulated
in three approximate measures Ð large, medium, small.
NEF513
DTC P1404 EGR SOL/V A, DTC P1405 EGR SOL/V B/P1407
THROTTLE SOLENOID VALVETD27Ti
EC-431

Diagnostic Procedure
EGR CONTROL
INSPECTION START
CHECK OVERALL FUNCTION.
1. Start engine and warm it up sufficiently.
2. Perform diagnostic test mode II (Self-
diagnostic results).
Make sure that diagnostic trouble code
P0000 (0505) is displayed.
3. Make sure that EGR valve spring
moves up and down (Use your finger)
under the following conditions.
At idle:
Spring does not move.
Racing engine from idle to 3,000
rpm:
Spring moves up and down.
4. Make sure that throttle control valve rod
moves up and down under the following
conditions.
At idle:
Rod does not move.
Racing engine from idle to 3,000
rpm:
Rod moves up and down.
NG
EOK
INSPECTION END
CHECK VACUUM SOURCES TO EGR
VALVE AND THROTTLE CONTROL
VA LV E .
1. Disconnect vacuum hoses to EGR
valve and throttle control valve.
2. Make sure that vacuum exists under
the following conditions.
At idle:
Vacuum should exist.
Racing engine from idle to 3,000
rpm:
Vacuum should not exist.
NG
EOK
CHECK COMPONENTS
(EGR valve and throttle
control valve).
(See page EC-439.)
NG
Replace malfunctioning
component(s).
qA
YEC243A
NEF509
YEC244A
NEF511
H
H
H
H
DTC P1404 EGR SOL/V A, DTC P1405 EGR SOL/V B/P1407
THROTTLE SOLENOID VALVETD27Ti
EC-436

qA
CHECK CONTROL FUNCTION.
With CONSULT-II
1. Turn ignition switch to ªONº position.
2. Turn EGRC-solenoid valve A, B and
throttle control solenoid valve to ªONº
and to ªOFFº in ªACTIVE TESTº mode
with CONSULT and check operating
sound.
Without CONSULT-II
1. Check voltage between ECM connector
terminals
208,210and engine
ground with tester under the following
conditions.
Voltage:
At idle:
Approximately 0.4V
Engine speed is more than 3,000
rpm:
Battery voltage
2. Check voltage between ECM connector
terminalq
1and engine ground with
tester under the following conditions.
Voltage:
At idle:
Approximately 0.4V
Engine speed is more than 2,400
rpm:
Battery voltage
NG
EOK
CHECK VACUUM HOSE.
Check vacuum hose for
clogging, cracks or
improper connection.
CHECK POWER SUPPLY-I.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect EGRC-solenoid valve A and
B harness connector.
3. Turn ignition switch to ªONº position.
4. Check voltage between EGRC-solenoid
valve A and B terminalsq
2and engine
ground with CONSULT-II or tester.
Voltage: Battery voltage
OK
ENG
Check the following:
I20A fuse
ICondition and operation
of ignition switch
IHarness connectors
M787,F66(LHD mod-
els)
IHarness connectors
F100,M775(RHD mod-
els)
IECM relay
IHarness for open or
short-circuit between
EGRC-solenoid valve A,
B and fuse.
If NG, replace fuse or
repair ignition switch, har-
ness or connectors.
qB
MEC953D
SEF816F
YEC247A
H
H
H
DTC P1404 EGR SOL/V A, DTC P1405 EGR SOL/V B/P1407
THROTTLE SOLENOID VALVETD27Ti
Diagnostic Procedure (Cont'd)
EC-437

Component Description
AIR CONDITIONER CUT CONTROL
Air conditioner is cut under the following conditions:
IStarting engine
IQuick acceleration from low speed
IUndershooting of idle speed
IHigh engine coolant temperature [above 107ÉC (225ÉF)]
IMalfunctioning of engine speed sensor, accelerator position sen-
sor or vehicle speed sensor when engine speed is below 2,100
rpm.
On Board Diagnosis Logic
DTC Malfunction is detected when ....Check Items
(Possible cause)
P1530
0805IAir conditioner relay signal circuit is shorted.IHarness or connectors
(The air conditioner relay signal circuit is shorted.)
IAir conditioner relay
DTC Confirmation Procedure
WITH CONSULT-II
1) Turn ignition switch and air conditioner switch to ªONº position.
2) Select ªDATA MONITORº mode with CONSULT-II.
3) Wait at least 2 seconds.
WITHOUT CONSULT-II
1) Turn ignition switch and air conditioner switch to ªONº position.
Wait at least 2 seconds.
2) Turn ignition switch to ªLOCKº position, wait at least 5 seconds
and then turn to ªONº position.
3) Perform ªDiagnostic Test Mode IIº (Self-diagnostic results).
DTC P1530 AIR CONDITIONER RLYTD27Ti
EC-440

Wiring Diagram
LHD MODELS
YEC154A
DTC P1530 AIR CONDITIONER RLYTD27Ti
EC-441

RHD MODELS
YEC155A
DTC P1530 AIR CONDITIONER RLYTD27Ti
Wiring Diagram (Cont'd)
EC-442

Diagnostic Procedure
INSPECTION START
(Air conditioner relay signal circuit)
CHECK POWER SUPPLY.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect air conditioner relay har-
ness connector.
3. Check voltage between air conditioner
relay connector terminalq
2,q3and
engine ground.
Voltage: Battery voltage
OK
ENG
Check the following:
I10A fuse
IHarness for open or
short between fuse block
and A/C relay
If NG, replace or repair the
parts attached.
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect ECM harness connector.
3.Check harness continuity between ECM
harness connector terminal
204and air
conditioner relay harness connector ter-
minalq
1. Refer to wiring diagram.
Continuity should exist.
If OK, check harness for short-
circuit.
OK
ENG
Check the following:
IHarness connectors
M812,F120(LHD mod-
els)
IHarness for open or
short-circuit between
ECM and air conditioner
relay.
If NG, repair harness or
connectors.
CHECK AIR CONDITIONER RELAY.
Refer to HA section for inspection.
OK
ENG
Replace air conditioner
relay.
Disconnect and reconnect harness
connectors in the circuit. Then retest.
Trouble is not fixed
Check ECM pin terminals for damage and
check the connection of ECM harness
connector. Reconnect ECM harness con-
nector and retest.
INSPECTION END
NEF512
PBIB0185E
H
H
H
H
H
H
DTC P1530 AIR CONDITIONER RLYTD27Ti
EC-443

Diagnostic Procedure
INSPECTION START
CHECK OVERALL FUNCTION.
1. Turn ignition switch to ªONº posi-
tion.
2. Check ªSTART SIGNALº in ªDATA
MONITORº mode with CONSULT-
II.
--------------------------------------------------------------------------------------------------------------------------------------OR--------------------------------------------------------------------------------------------------------------------------------------
1. Turn ignition switch to ªSTARTº
position.
2. Check voltage between ECM con-
nector terminal
422and engine
ground.
Voltage:
Ignition switch ªSTARTº:
Battery voltage
Except above:
Approximately 0V
NG
EOK
INSPECTION END
Check if 40A fusible link is OK.
OKENG
Replace 40A fusible link.
CHECK INPUT SIGNAL CIRCUIT.
1. Turn ignition switch to ªLOCKº position.
2. Disconnect ECM harness connector,
ignition switch connector.
3. Check harness continuity between ECM
connector terminal
422and ignition
switch connector terminalq
5. Refer to
wiring diagram.
Continuity should exist.
If OK, check harness for short circuit.
OK
ENG
Check the following:
IHarness connectors
M787,F66(LHD mod-
els)
ICondition and operations
of ignition switch
IHarness for open or
short-circuit between
ECM and ignition switch
If NG, repair ignition
switch, harness or con-
nectors.
Disconnect and reconnect harness connec-
tors in the circuit. Then retest.
Trouble is not fixed.
Check ECM pin terminals for damage and
check the connection of ECM harness con-
nector. Reconnect ECM harness connector
and retest.
INSPECTION END
IGN ªONº OFF
IGN ªSTARTº ON
PBIB0763E
MEC966D
H
H
H
H
H
H
START SIGNALTD27Ti
EC-450